--- a/log_search.py	Mon Feb 09 23:49:57 2009 +0200
+++ b/log_search.py	Tue Feb 10 00:04:15 2009 +0200
@@ -8,6 +8,20 @@
 
 import log_line
 
+class LogSearchError (Exception) :
+    """
+        General search error
+    """
+
+    pass
+
+class NoResultsFound (LogSearchError) :
+    """
+        No results found
+    """
+
+    pass
+
 class LogSearchIndex (object) :
     """
         An index on the logs for a group of channels.
@@ -111,12 +125,16 @@
 
     def search_cond (self, cond) :
         """
-            Search using a raw hype.Condition
+            Search using a raw hype.Condition. Raises NoResultsFound if there aren't any results
         """
 
         # execute search, unused 'flags' arg stays zero
         results = self.db.search(cond, 0)
 
+        # no results?
+        if not results :
+            raise NoResultsFound()
+
         # iterate over the document IDs
         for doc_id in results :
             # load document, this throws an exception...